Loading...
Please wait, while we are loading the content...
Electrochemical performance of nanocrystalline nickel/gadolinia-doped ceria thin film anodes for solid oxide fuel cells
| Content Provider | Semantic Scholar |
|---|---|
| Author | Muecke, Ulrich P. Akiba, Kojiro Infortuna, Anna Šalkus, Tomas Stus, N. V. Gauckler, Ludwig J. |
| Copyright Year | 2008 |
| Abstract | Abstract Nickel oxide/Ce 0.8 Gd 0.2 O 1.9 − x (NiO/CGO) films were deposited by spray pyrolysis and pulsed laser deposition on polished CGO electrolyte pellets. The thicknesses of the as-deposited films were 500–800 nm. The sprayed films showed a homogeneously distributed nano-grain sized microstructure after annealing in air whereas the PLD films exhibited a texture with elongated columnar grains oriented perpendicular to the substrate surface. The electrochemical performance of the Ni/CGO cermet thin film anodes was measured in a symmetrical anode/electrolyte/anode configuration in a single gas atmosphere setup by impedance spectroscopy. The polarization resistance of 60/40 vol.% Ni/CGO spray pyrolysed films decreased with decreasing grain size and was 1.73 and 0.34 Ω·cm 2 for grain sizes of 53 and 16 nm, respectively, at 600 °C in 3% humidified 1:4 H 2 :N 2 . The activation energy was 1.45 and 1.44 eV in the temperature range of 400–600 °C. The performance of the 49/51 vol.% Ni/CGO PLD cermet film was comparable to the spray pyrolysis films and was 0.68 Ω·cm 2 at 600 °C with an activation energy of 1.46 eV. The electrochemical performance was similar to state-of-the-art thick film anodes and the Ni/CGO thin film cermets are promising candidates as electrodes in micro solid oxide fuel cells. |
| Starting Page | 1762 |
| Ending Page | 1768 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.ssi.2007.10.002 |
| Alternate Webpage(s) | http://www.nonmet.mat.ethz.ch/research/onebat/publications/Electrochemical_performance_of_nanocrystalline_nickel-gadolinia-doped_ceria.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.ssi.2007.10.002 |
| Volume Number | 178 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
